Characterizing 6 August 2007 Crandall Canyon mine collapse from ALOS PALSAR InSAR

Geomatics, Natural Hazards and Risk
By:  and 



We used ALOS InSAR images to study land surface deformation over the Crandall Canyon mine in Utah, which collapsed on 6 August 2007 and killed six miners. The collapse was registered as a ML 3.9 seismic event. An InSAR image spanning the time of the collapse shows 25–30 cm surface subsidence over the mine. We used distributed dislocation sources to model the deformation field, and found that a collapse source model alone does not adequately fit the deformation field. Normal faulting is also required, such that the event is best characterized as a ‘trapdoor’ collapse. The calculated moment of the normal fault is about the same as the moment of the collapse source, with each larger than the seismically computed moment. Our InSAR results, including the location of the event, the extent of the collapsed area, and constraints on the shearing component of the deformation source, all confirm and extend recent seismic studies of the 6 August 2007 event.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Characterizing 6 August 2007 Crandall Canyon mine collapse from ALOS PALSAR InSAR
Series title Geomatics, Natural Hazards and Risk
DOI 10.1080/19475701003648077
Volume 1
Issue 1
Year Published 2010
Language English
Publisher Taylor & Francis
Contributing office(s) Earth Resources Observation and Science (EROS) Center, Volcano Science Center
Description 9 p.
First page 85
Last page 93
Country United States
State Utah
County Emery
Other Geospatial Crandall Canyon Mine
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